"Heart has chosen to decline their forthcoming performance at SeaWorld on 2/9/14 due to the controversial documentary film Black Fish." the band said Sunday on its verified Twitter account. Sisters Nancy and Ann Wilson did not elaborate. Country singer Willie Nelson and Canadian rock act Barenaked Ladies also have cancelled shows at the parks in response to the film, which raises questions about the safety and humaneness of keeping killer whales in captivity over the past 39 years.

From the comments: "Ann was probably afraid they'd keep her in the tank."